Rotary engine.



Patented luly I8, |899. W. lA. PARKER. .l ROTARY ENGINE.

(Application filed Jme 4, 189B.)

3 Sheets-Shaet I.

(No Model.)

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v Patented luly I8, |899. W. lA. PARKER` RUTABY ENGINE.

(Application led June 4, 1898.)

3 Sheets-Sheei 2.

(No Model.)

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im ....yf/ @www en@ Patented luly I8, |899. W. A. PARKER.

ROTARY ENGINE.

(Application led June 4, 189B.)

3 Sheets-Shen 3.

(No Model.)

entre v Afrnfr ROTARY ENGINE.

SPECIFICATION arming part of Letters Patent No. 628,960, dated July 18,1899- Applieation filed lune l1,1898. Serial No. 682,618. (No model.)

To a/ZZ whom t may concern:

Beit known that I, WILLIAM A. PARKER, a citizen of the United States ofAmerica, residing at Collins, in the county of Story and State of Iowa,have invented a new and useful Rotary Engine, of which the following isa specification.

The object of this invention is to provide means for balancing theconcentric piston of a rotary steam-engine and in so doing minimize thefriction of said piston and provide for the maximum efiiciencyin the useof steam thereby.

Afurther object of my invention is to provide cut-olf valves for theconcentric piston in order that the expansion of the steam may beutilized to the fullest extent.

My invention consists in the construction, arrangement, and combinationof elements hereinafter set forth,pointed out in my claims, andillustrated by the accompanying drawings, in Which- Figure 1 is a planof the engine. Fig. 2 is a sectional elevation of the enginetransversely of the concentric piston. Fig. 3 is an elevation of theengine, the casing thereof being removed and shown by dotted lines. Fig.4c is an interior elevation of the engine, showing cut-off valvesapplied therein. Fig. 5 is a sectional elevation similar to Fig. 2,showing the cut-off valves Vin place.

In the construction of the engine as shown the numerals 10 11 designatecylinder-heads, and 12 a cylinder-casing mounted between andcommunicating with said heads. The cylinder-heads 10 and 11 are providedwith base portions 13 14, adapted for securance to v:an engine-bed, andthe cylinder-casing is annular in form. A main shaft 15 is mounted forrotation in stuffing-boxes 16 17, axially positioned in thecylinder-heads 10 11, and a balance-Wheel 18 is keyed upon said mainshaft adjacent to the cylinder-head 10. A drive-wheel (not shown) may.be mounted upon the main shaft and employed to communicate the motionthereof to mechanism to be driven in a common and Well-known manner.

The numeral 19 designates the steam-supply pipe, leading from a boilerand carrying a three-way valve 20, so arranged as that in one positionsaid valveisopen forthe passage Y from said cylinder-head.

of steam from the supply-pipe into both of tWo ingress-pipes 21 22,communicating therewith. The ingress-pipe 22 leads from the valve 20,located at 'one side of the enginecylinder, and is tapped into aningress-port 23 in the cylinder-head 11. The ingress-port 23 extendsthrough the cylinder-head 11 and through a cam-faced block 24, locatedon and extended inwardly from said cylinder-head.v Immediately above theingress-port 23 is 10- cated an exhaust-port 25, also extending throughthe cam-faced block 24 and cylinderhead 11. An exhaust-pipe 36 is tappedinto the exhaust-port 25 in the cylinder-head 11. A line drawn throughthe axes of the exhaustports 23 and 25 will be laterally removed fromand to the rear of the axis of the main shaft 15. The ingress-pipe 21leads from the valve 20 above and across the axes of the cylinders-heads 10 11 and is tapped into an ingressport 27 (dotted lines in Fig.3) in the cylinder-head 10. The ingress-port 27 in the cylinder-head '10also traverses a cam-faced block 28, xed to` and extending inwardlyImmediately below the'ingre'ss-port 27 and also traversing the cam-facedvblock 28 and in cylinder-head 10 is an exhaust-port 29. Aline drawnthrough the axes of the ports 27 29 would beat the front of the axis ofthe main shaft 15 and on the opposite side of said shaft from a linedrawn through the axes of the ports 23 25. An exhaust-pipe 30 is tappedinto the exhaustport 29 in the cylinder-head l0. Hubs 31 and are formedon the blocks 24 and 28 and extend toward each other to the planes ofthe innermost points of said blocks and surround the main shaft 15concentrically. A concentric piston 33 is mounted rigidly on the mainshaft 15 between the hubs 3l 32 and is provided with circumferentialpacking-rings-34 35, engaging the axial surface of the cylinder-casing12. A sliding piston 36 is mounted loosely in and arranged for slidin gengagement with the concentric piston 33. The slidingpiston 36 extendsradially of the concentric piston 33 from the peripheries of the hubs 3132 to the axial surface of the cylinder-casing 12 and in length fromside to side of the concentric piston and extending therefrom on oneside or the other. Packing-blocks 37 38 are slidingly mounted in slotsformed in the extremities of ICO the sliding piston 36. Each of thepackingblocks 37 38 is slotted transversely, and pins 39 traverse saidslots and are seated in the arms of the slidingpiston 36. Expansivecoilsprings 40 are located between the inner ends of the packing-blocks37 38 and the sliding piston 36,Whereby said packing-blocks are impelledoutwardly at all times and into frictional engagement with the cam-facesof the blocks 27 28.

When the engine is to be operated with the direct force of the steam,said steam is turned through the port 23, acts upon the projectingportion of the sliding piston 36 and packingblock 38, and rotatablymoves the concentric pist-on beyond the port 25, at which place or port25 the steam exhausts. Upon the exhaust of the steam through the port 25steam introduced through theport 27 acts upon the opposite and nowprojecting portion of the sliding piston 36 and the packing-block 37 andimpels the piston beyond the port 29, at which the steam introducedthrough the port 27 exhausts. Continuous introduction of the steam andalmost continuous exhaust thereof successively from opposite sides ofthe concentric piston tends to balance said pistou and set up andcontinue the movement of rotation thereof. It Will be observed thatthroughout a portion of its circumference the concentric piston engagesfrictionally at its sides with plane faces of the blocks 24 and 28,which engagement serves as a cut-off for the stealn to prevent the wastethereof rearwardly.

When the engine is to be operated by expansion, I employ the structureshown in Figs. 4 and 5, in which the cylinder-heads l0 1l are centrallyapertured and provided with closingplates 4l 42. The cam-faced blocks 2428 are recessedin their outerfaces,and cut-off valves 43` 44 are mountedbetween the blocks and closing-plates and keyed to the main shaft 15.

Segments of the valves 43 44 are cut away at opposite point-s of theperipheries thereof, as shown and indicated by the numerals 45 46 in thedrawings. In the rotation of the main shaft the cut-off valvessuccessively and alternately cut off the passage of the steam throughthe ports in the blocks 24 28 and permit the expansion of the steam tocontinue the rotation of the concentric piston.

I claim as my inventionl. In a rotary engine, a cylinder, heads in theends of the cylinder provided with bearings for a shaft, a rotatableshaft in concentric position with the cylinder, a piston fixed to theshaft, cam-faced blocks having integral hubsk mounted on the shaft atthe sides of the piston, Avalves having segments cut away fitted in thecylinder between said blocks and the heads and ingress and exhaustports, all arranged and combined as shown and described to operate inthe manner set forth for the purposes stated.

2. The concentric piston mounted for rotation, the camsfaced blocks oneither side of said concentric piston, the sliding piston mounted forreciprocation across the face of the concentric piston, packing-blocksyieldingly mounted in the ends of the sliding piston, ingress andexhaust ports for the steam arranged in duplicate on opposite sides ofthe concentric piston and on opposite sides of the axis thereof, asupply-valve, -a main shaft carrying the concentric piston and thecut-off valves mounted on the main shaft and controlling the ingress andexhaust ports, which cut-off valves are formed with peripheral notchesapproximating in length to one-half the circumference ofsaid valves.

VILLIAM A. PARKER.

Witnesses:

W. H. OZMEN, J. G. GINGLER.

